Design for a display appartus



FIG. 1 is a perspective view of a display apparatus according to my new design, with elements of an automatic teller machine which form an illustrative environment for the display apparatus being illustrated in broken lines which are for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom view thereof;

FIG. 5 is a left side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a right side elevational view thereof. 

The ornamental design for a display apparatus, as shown and described. 